(... is a kind of carbonate ) a white salt (K2CO3) that is basic in solution; used to make glass and cleansing agents

(... is a kind of carbonate ) a salt found in nature as chalk or calcite or aragonite or limestone

(... is a kind of carbonate ) a white powder (LiCO3) used in manufacturing glass and ceramics and as a drug; the drug (trade names Lithane or Lithonate or Eskalith) is used to treat some forms of depression and manic episodes of manic-depressive disorder